Police are appealing for witnesses after a man exposed himself to four girls as they walked along an alleyway in South Normanton.
The incident happened on the path between Corn Close and Coronation Drive shortly after 11am on Saturday, April 30.
The man appeared from behind some bushes and exposed himself to the girls, who were aged between 13 and 16.
As the victims ran off, they said they saw an elderly woman walking her dog in the area and a group of youths playing football on fields at the end of the alleyway.
Police want to speak to any of those people to see if they witnessed the incident or saw the man.
The offender was white, about 5ft 6ins, of slim build and with short ginger hair. He was wearing blue jeans and a burgundy zip-up top with the hood up.
Witnesses or anyone with information should call PC Megan Pilgrim on 101, quoting crime reference 18753/16. Alternatively, call Crimestoppers on 0800 555 111.